一种磷酸铁锂 / 碳 / 富锂铁酸锂复合正极材料及其制备方法与应用

By preparing a composite cathode material of lithium iron phosphate/carbon/lithium-rich lithium iron phosphate, the problem of short lifespan of lithium iron phosphate cathode material at high rates was solved by combining porous carbon and lithium-rich lithium iron phosphate, thus achieving high rate and long lifespan characteristics at low cost.

CN118206093BActive Publication Date: 2026-07-17YINZHU (NINGBO) TECHNOLOGY LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
YINZHU (NINGBO) TECHNOLOGY LTD
Filing Date
2024-03-20
Publication Date
2026-07-17

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Abstract

本发明属于锂离子电池正极材料技术领域，公开了一种磷酸铁锂 / 碳 / 富锂铁酸锂复合正极材料及其制备方法与应用。本发明所述制备方法包括以下步骤：将铁盐、锂化合物、正磷酸盐、有机盐与水混合，得到混合料浆；将混合料浆进行喷雾造粒，得到前驱体粉体；在保护气氛下，将前驱体粉体进行保温，得到磷酸铁锂 / 碳 / 富锂铁酸锂复合正极材料。本发明基于多孔碳的双电层物理储能增强倍率、富锂铁酸锂添加剂增加体系锂源和延长使用寿命的特性，结合磷酸铁锂、富锂铁酸锂的合成工艺，采用一步法合成了具有高倍率、长寿命的多孔结构磷酸铁锂 / 碳 / 富锂铁酸锂复合正极材料，有效拓展了磷酸铁锂正极材料的应用领域。
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